A method and apparatus for automatic determination of a fiber type of at least one optical fiber span used in a link of an optical network, the method comprising the steps of measuring a length of said optical fiber span; measuring a chromatic dispersion of said optical fiber span; determining a fiber dispersion profile of said optical fiber span on the basis of the measured length and the measured fiber chromatic dispersion; and determining a fiber category and/or a specific fiber type of said optical fiber span depending on the determined fiber dispersion profile.

An alignment optical measurement element includes a grating coupler, and a reflector coupled to the grating coupler. The alignment optical measurement element is arranged so that: the grating coupler diffracts an incident light in a first direction into a first diffracted light to propagate the first diffracted light as a first propagating light in a second direction, the reflector reflects the first propagating light into a second propagating light in a third direction opposite to the second direction; and the grating coupler diffracts the second propagating light into a second diffracted light to emit the second diffracted light as an emitted light in a fourth direction opposite to the first direction.

Both a conventional receiver and an HDR-compatible receiver well perform electro-optical conversion processing on transmission video data obtained by using an HDR opto-electronic transfer characteristic. High dynamic range opto-electronic conversion is performed on high dynamic range video data to obtain the transmission video data. Encoding processing is performed on this transmission video data to obtain a video stream. A container of a predetermined format including this video stream is transmitted. Metadata information indicating a standard dynamic range opto-electronic transfer characteristic is inserted into a layer of the video stream, and metadata information indicating a high dynamic range opto-electronic transfer characteristic is inserted into at least one of the layer of the video stream and a layer of the container.

An optical adjustment apparatus includes a measurement-light irradiation part that has a plurality of second optical fibers and emits, with timings different from each other, a plurality of lights having a single wavelength via the second optical fibers, an optical fiber block that holds exit-side end portions of the first and second optical fibers, a light detection part that receives and detects a plurality of reflected lights via the second optical fibers, a tilt calculation part that compares, with each other, variations with time of intensities of the respective reflected lights and calculates a tilt of the optical fiber block relative to the optical substrate, and a distance calculation part that calculates an inter-end surface distance between the optical substrate and the optical fiber block, based on a variation with time of an intensity of at least one reflected light.

An optical assembly for realizing horizontal and vertical spot-size conversion to couple light from a thin waveguide to a thick waveguide is disclosed. The assembly comprises at least one first thin waveguide with a first section having a first optical mode field and a horizontal spot-size expansion section providing spot-size conversion for a first horizontal dimension of said first optical mode field of a light beam propagating in said first waveguide, and at least one second thick waveguide with a second section having a second optical mode field and a horizontal spot-size reduction section providing spot-size conversion for a second horizontal dimension of said second optical mode field of a light beam propagating in said second waveguide. The expanded end of said first waveguide is aligned and rotated to interface with the reduced end of said second waveguide, so that the mode fields in said first and second waveguides are rotated 90 degrees with respect to each other, whereby the spot size of a light beam so coupled between the first and second waveguides is expanded or shrunk in both transverse dimensions, depending on the direction of the light beam.

The method comprises the steps of A) equipping the end of the fiber with an added microstructure (MS) arranged so as to provide support on a surrounding structure forming a support (SE) distinct from the photonic device (PIL) and to prevent any contact with a sensitive surface (FA) of the photonic device, B) optimally aligning, in position and in angle, the fiber end with the sensitive surface, and C) exerting on the microstructure and/or the optical fiber a bearing pressure (P) against the surrounding support structure, maintaining an optimal spacing distance (D) and alignment between the fiber end and the sensitive surface.

Embodiments described herein may be related to apparatuses, processes, and techniques directed to a double-sided glass substrate, to which a PIC is hybrid bonded to a first side of the glass substrate. A die is coupled with the second side of the glass substrate opposite the first side, the PIC and the die are electrically coupled with electrically conductive through glass vias that extend from the first side of the glass substrate to the second side of the glass substrate. Other embodiments may be described and/or claimed.

A dynamic concentrator system having a concentrator lens, a tracker platform and a receiver. In an embodiment, the concentrator lens is configured to receive an incoming light at an entrance angle a and concentrate the light beam on a focus spot. The tracker platform has a detector optical aperture and one or more actuators. The detector optical aperture can be configured to receive the concentrated light beam. The actuators can move the detector optical aperture in a spatial plane to a location of the focus spot. The receiver has a detector optically coupled to the detector optical aperture to receive the concentrated light beam from the detector optical aperture.

The invention relates to a method and to an assembly (200) for localizing an optical coupling point (11) and to a method for producing a microstructure (100) at the optical coupling point (11). The method for localizing an optical coupling point (11) comprises the following steps: a) providing an optical component (10), which comprises an optical coupling point (11), the optical coupling point having an interaction region (15) lying outside of a volume encompassed by the optical component (10); b) producing optical radiation in a production region (120), the production region (120) overlapping at least partly with the interaction region (15) of the optical coupling point (11), light being applied to a medium (19) located in the production region (120), which light is modified by the medium (19) in such a way that the optical radiation is thereby produced; c) sensing at least part of the produced optical radiation in a sensing region (130), the sensing region (130) overlapping at least partly with the interaction region (15) of the optical coupling point (11), and determining a spatially resolved distribution of the sensed part of the produced optical radiation; and d) determining the localization of the optical coupling point (11) from the determined spatially resolved distribution of the sensed part of the produced optical radiation, the optical radiation being produced or at least the part of the produced optical radiation being sensed through the optical coupling point (11). The optical coupling point (11) can thereby be precisely localized with a relative positioning tolerance of better than 1 μm. Thus, low coupling losses of an optical connection to the optical component (10) can be achieved and microstructures (100) can be precisely placed at the optical coupling point (11).

Laser apparatus (10) includes at least: a laser oscillator that emits laser light (LB); reflection mirrors (M1), (M2) that are disposed on an optical path of laser light (LB) and change the optical path; actuators (ACT1), (ACT2) that are respectively coupled to reflection mirrors (M1), (M2) and displace reflection mirrors (M1), (M2); optical axis deviation detector (16) that is disposed to surround the optical path of laser light (LB) and detects an optical axis deviation of laser light (LB); and a controller that drives actuators (ACT1), (ACT2) on the basis of a detection result of optical axis deviation detector (16) to displace reflection mirrors (M1), (M2) and correct the optical axis deviation of laser light (LB).